Machine for drawing sheet-glass.



2 SHEETS-SHEET l.

G. AVSHIELDS.

MACHINE FOR DRAWING SHEET GLASS.

APPLICATION FILED MAY 28, 1913. 1,1 333%2 Patented Mar. 30, 1915.

I 5 "u h m n 3 W H I T m. i mv A V w H mm E N im W M m mm A .HHF PMHHI I IHHHHHHIH HIWHHNHH I Pl. Ea.

w \w m G. A. SHIELDS.

MACHINE FOR DRAWING SHEET GLASS.

APPLICATION FILED MAY 28.1913.

1,133,752, Patented Mar. 30, 1915 2 SHEETS-SHEET 2 INVENTOR.

fin @157 GEORGE A. 511111135 WW Wadi-am AT ORNE Y.

w en snares rat-inn t i 1 Ir f g GEORGE A. SHIELDS, 0F COLUMBUS, OHIG.

MACHINE EOE DRAWING- SHEET-GLASZS.

Specification of Letters Yatent.

Patented Mar. 3d, 1915.

Application filed May 28, 1913. Serial No. 779,366.

To all whom it may concern.

Be it known that I, Gnoncn A. SHIELDS, a

citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Machines for Drawing Sheet-Glass, of which the followinpris a specification.

he present invention relatesto improvements in machinery for drawing sheet glass.

will be apparent in the following specification, and accompanying'drawings inwhich Ihave' illustrated one complete example and several modified forms-of the physical emv bodiment of my invention, constructed ac- 'common flue for the heat rom the reheatcordin to the best mode I have so far devised $0 the practical application of the principles of the invention.

In the drawings: Figure l is a vertical sectional view showing the drawing machinery employed with the tank and oven.

.Fig. 2 is a view at the front of the furnace showin the ovens and lass ots in section and. showing particularly the shiftable drawing device, and its connections. Fig. 3

is a transverse sectional view through a hinged, asbestos, cylindrical shield which encompasses the glass cylinder 'as it is drawn. Fig. 4: is an enlarged detail view of the drawing tube and its connections.

Referring particularly to Figs. 1 and 2 it will be noted that the furnace ortank 1 in which the glass is melted is formed with a pair of side ports 2' 2. which open into the tank from suitable flues 3.

In connection with the furnace or tank of Figs. 1, 2, I have illustrated a pair of ovens 6 and 6', and the top of each of the ovens is formed with a circular open seat '7 that is connected to the front wall of the furnace by avtrough 8 which opens into the interior of the tank. Each trough is equipped with, a gate 10 which extends there-across, and the gate may be-lifted by means of the draw bar 11 and rocker arm 12 to regulate-the flow of plastic glass through the trough.

The pair of ovens are rovided with a ing burners 14:, which are located in. the

lower part of the ovens. These re-heaters are for'the purpose of maintaining the heat of the plastic glass after it has fie-wed through the troughs and into oneof the pair of glass pots 16, 16. These pots have double receptacles for the glass and. are supported on posts 1'? rising from the open.

floor- 18 of the oven, and are located directly beneath the open top of the oven in line with the opening or seat 7.

The glass pots are reversible and may be manipulated by means of a pair of tongs 19 suspended from a track 20 and provided with rollers 21 (Fig. 1) in order that the pot may be withdrawn through the opening 22 in the front of the oven.

A lifting device for the poiis illustrated 4 in Fig. 1 and comprises a foot bar or pedal 23 that projects above the floor line and is connected to a lever 12%, fulcrunied at 25 in the oven wall. This lever contacts with a. lifting device 526 made up of ch: and a. top 27, the latter engaging the under side of the glass pot when lifting the pot.

The glass is drawn from the pot in cylindrical form. by a single device, although I .employ a plurality of glass pots and corre sponding ovens. The drawing tube is formed with a foot piece 29 which is adapted to contact with and attach to the plastic glass in the glass pot. The tube is supported in a cross head 30 slidablc on the guide bars or rods 31 which form a suspending, shiftable frame,'\vith braces 31 and a cylindrical shield or covering\83 preferably of as bestos. The drawing tube communicates .with the passage 3% in the cross head and the air hose 35 for blowing, is attached to the cross head.v The frame is formed with a pair of hinged doors or walls 36 and 37 adapted to open outwardly and expose the interior of the asbestoslined cylinder.

The cross head 30 is suspended by a rope '38 from a drum 39. and the rope, after pass ranged to slide on a revoluble shaft 46 which is revolved from a motor 47 by the sprocket wheels 48, 49 and chain 50. The carriage, drum and drawing frame are shifted by means of the ropes 51, 52 and winding drums 53, 54. -The drums are turned by handles 55 and the ropes pass over idle pulleys 58 journalcd on the beam 43 and are attached to the carriage at either end. The drum 39 may. be provided with a key to travel in a groove in the shaft 46 so that itmay be revolved at any position, A forwardly projecting bracket 57 is shown (Fig. 1) from which a pair of shears may be suspended for use in cutting the plastic glass, and a pyrometer is indicated at 58, 58, for indicating the degree of heat in the ovens.

The material in the tank or'furnace is heated to the required temperature, and the glass is drawn ofi' from the batch through one trough 8 at a time. Thus in Fig. 2 assuming that pot 16 is to be filled the gate 10 is opened to permit the molten glass to flow through the trough to the pot, and when a suflicient quantity has been deposited therein the gate is closed. The drawing tube is now lowered with the foot 29 in the molten glass, and the blowing device in operation, the d awing tube is lifted by means of the cord 3 and drum 39, which action pulls or draws a hollow cylindrical sheet up inside the asbestos shield 33. When a 'sufii cient length has been drawn,-the cylinder is cut oli below the shield, the hinged doors of the shield opened and the shield and glass cylinder swung to the right (Fig. 1) so that the glass cylinder may be removed and tinished in usual manner. The glass pot 16 is now, reversed and the receptacle is cleaned by heat from the burner 14. By turning the drawing machine is carried back and,

forth, the used receptacles are cleaned, and the cylinders of glass are continuously pro duced without loss of time, and with slight expenditure of labor.

, What I claim is '1. The combination in a glass drawing machine with a supporting frame and a movable carrier thereon, of a revoluble shaft supported in the frame and carrier, guide bars movable on the shaft and means for moving them, a hollow cross hea d slidable on the bars, a blowing hose attachedto the upper portion of the cross head, a drawing tube attached to the lower portion of the cross head, a drum on the shaft, and a rope wound upon the drum and coniiected to said cross head.

2. The combination in a glassdrawing machine with a supporting frame andmovable carrier thereon, of a revoluble shaft supported in the frame and carrier, oscillatable and laterally movable guide bars on the shaft, a hollow cross head slidable on the bars and having a blowing hose and drawing tube, a drum on the shaft and a rope connected to the cross head, and an optenable shield surrounding said drawing tu e. In testimony whereof I afiix my signature in presence of two witnesses.

GEORGE A. SHIELDS. Witnesses:

C. M. SHIG'LEY, F. M. GLICK. 

